Ballard, William Cyrus, Jr · New York [etc.] McGraw-Hill company, inc. · leaf 46
be seen thatthis device should have a distinct apphcation in amphfyingweak voltages. There are a number of mechanical illustrations of ampli-fier action, for instance, the tremendous blow of the steamhammer can be controlled by an easily operated valve in thehands of the operator. The operator… … VACUUM TUBE OSCILLATORS 25 tion with another five-pound force applied upwards andrelease the five-ton pressure on the anvil. If we are toconsider this action in the same sense of amplifier as appliedto the vacuum tube; we would say that the five-poundblow of the operator had been amphfied into a…
Radio
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